Refrigerators, transformers, ACs and tubelights would be brought under the mandatory labelling of the Bureau of Energy Efficiency (BEE) from January 7, a top BEE official said on Friday. The Bureau has already issued notification in this regard and refrigerators up to 460 litres, ACs up to two tonnes, tubelights and all kinds of transformers would be covered under the mandatory BEE labelling, its director-general, Mr Ajay Mathur, said. Pumps and motors, colour television sets, LPG stoves, and electric storage water heaters would be under voluntary labelling, which depending on the market response would be converted into mandatory labelling category, he added. The electric items like pumps and ceiling fans were already in the category of voluntary labelling mechanism. The Bureau is working to bring some more products, like washing machines, mobile chargers, set top boxes, inverters, diesel pump sets, computers, laptops, fax machines and printers under mandatory labelling, which would become operational in other two years. Mr Mathur said by implementing these labels the nation can save a minimum 10,000 MW power annually.